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Related Experiment Videos

Contact allergy to Bronopol.

P J Frosch1, I R White, R J Rycroft

  • 1Department of Dermatology, University of Heidelberg, FRG.

Contact Dermatitis
|January 1, 1990
PubMed
Summary
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Patch testing revealed a low sensitization rate for the preservative Bronopol (0.47%) across seven European clinics. Clinical relevance was observed in only 0.21% of cases, suggesting limited impact in cosmetic and medicament use.

Area of Science:

  • Dermatology
  • Contact Dermatitis Research
  • Cosmetic Ingredient Safety

Background:

  • Bronopol is a preservative used in cosmetics and medicaments.
  • Concerns about preservative sensitization necessitate evaluating individual agent safety.
  • European contact clinics provide a valuable data source for patch testing.

Purpose of the Study:

  • To determine the sensitization rate of Bronopol through patch testing in a large European cohort.
  • To assess the clinical relevance of positive Bronopol patch test reactions.
  • To compare Bronopol's sensitization potential with other common preservatives.

Main Methods:

  • Multi-center patch testing involving 8149 patients across 7 European contact clinics.
  • Standardized patch testing procedures were employed.

Related Experiment Videos

  • Data analysis focused on irritant and allergic reactions, and clinical relevance.

    • Main Results:

    • A low rate of allergic reactions to Bronopol (0.47%) was observed.
    • Irritant reactions were minimal (0.12%).
    • Only 0.21% of reactions were deemed clinically relevant; 1/3 showed concomitant formaldehyde sensitization.

    Conclusions:

    • The current sensitization rate for Bronopol in Europe appears low.
    • Lower usage compared to parabens or isothiazolinones may contribute to its reduced sensitization potential.
    • Bronopol demonstrates a favorable safety profile regarding allergic contact dermatitis.